यदि $x=\log _{a} b c, y=\log _{b} c a, z=\log _{c} a b,$ है,तो

  • A
    $x y z=x+y+z+2$
  • B
    $x y z=x+y+z+1$
  • C
    $x+y+z=1$
  • D
    $x y z=1$

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